> For the complete documentation index, see [llms.txt](https://docs.tailent.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tailent.com/knowledge-base-1/unblocking-action-.dll-files.md).
# Unblocking Action .dll Files
In rare instances where TAP Studio installation is moved or copied from other sources than the official installation wizard, certain Windows security features might block some .dll components necessary for TAP to run properly.
This happens most commonly to the **MissionCritical.Actions.dll** file, as it references multiple automation functionalities.
To unlock this (and other dll files), you will need to navigate to their respective locations in **Windows Explorer -> right click the file -> select Properties -> General Tab -> Check the unblock checkbox -> Click Apply**
Once this action has been completed, please restart any TAP Components you wish to use.
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